ETI 4600 Modular Synthesizer 1975 Analog synth

via this auction

"Extremely rare modular synthesizer. This was the predecessor to the Maplin 5600S and was available from 1973 (just after the EMS VCS3 became available) as a kit in the UK

The synthesizer has the following features:

4 VCO voltage controlled oscillators (each with sin, tri, saw, inverted saw and square wave with pulse width
All oscillators can be switched to Low range and have 32, 16, 8, 4, 2, 1 and 1/2' settings for pitch!
2 VCF voltage controlled filters (multimode lpf/bpf/hpf)
2 Amplifiers or Ring Modulators
3 envelope generators in the form of 1 Envelope Generator and 2 Transient Genrators
5 Mixers (3 x 5 input and 2 x 2 input)
1 Noise generator (pink & white)
1 Equalizer
1 Spring reverb
1 keyboard controller for glide and pitch modulation
1 joystick controller
1 four octave CV-Gate keyboard
1 Pitch Matrix patching system. Instead of patch cords, the system is patched this way

There are approx 15 pins for patching included"

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